US26451A

US26451A - Island

Info

Publication number: US26451A
Authority: US
Publication date: 1859-12-13
Anticipated expiration: 1876-12-13

Description

UNITED STATES PATENT OFFICE.

EUCLID C. THAYER, 0F PROVIDENCE, RHODE ISLAND.

IBELTING FOR PULLEYS.

Specification of Letters Patent No. 26,451, dated December 13,118159.

To all 'whom 'it 'may concern.'

Be it known that I, EUCLID C. THAYER, of the city and county of Providence, in the State of Rhode Island and Providence Plantations, have invented a new and useful manufacture, to wit.: an Improved Round Belting for Grooved Pulleys, which is fully described in the following specification, reference being had to the accompanying drawings.

A strip of leather or other material of which the belting is to be made, is prepared as represented in Fig. l by A, B, C, D, of such width and thickness as may be required, by shaving the edges or in any other mode so that its transverse section as seen at A, s, t, B, is in an elliptical form or nearly so; the more perfect the ellipse the greater the perfection of the belting. The material being so prepared, the belt is made by rolling and twisting the material in the following manner: Commencing at the corner Atheleather or other material is rolled from that cornerto the points a, b, e, or el, according as a greater or less number of overlapping layers is required to make the belt of the requisite size and strength, forming at the ends A, B, a cylinder F, and as the process of rolling is continued the material is twisted so that the strip is rolled up spirally, the same inclination of the spiral fold being preserved to the end of the belt. `A belt constructed in this manner may be made of any length by lapping and cementing additional strips at the end C, D, either at right angles with the length of the strip or diagonally. As the rolling and twisting proceeds a cement is placed upon the surfaces of the strip by which the overlying folds are firmly secured together and the more firmly than if the material was rolled in any other way.

I prefer to so roll the material as to leave a cylindrical space in the center ofthe belt by means of which greater flexibility is secured to it, but the belt may be so made that when finished it will be solid. f When the belt is made of leather this spiral `rolling and I twisting reatly increases :the strength` of 1 the belt for" the bers `of the leather are crossed in every direction, and furthermOre if the leather is weak in any part the lweak points of the leather will be `overlapped `by the stronger portions and thus a moreuni` form strength obtained.

. When the belt is m use if the strain upon it should cause the fibers of the belt to givel y i way at the overlapping edge as at 71., theY l break being generally in a direction at right angles with the spiral fold, wouldsoon be 1l y arrested bythe Vstrenth ofthe under por``` 60 tions of the belt and bythe overlapping 1 y edge. The spiral form `of thebeltyas above l y made prevents the edges of the leatheropen-` j ing by the giving way "of the cement,and `l when, combined wit-ha cylindrical space in the center of the belt imparts greater leXibility andelasticity, at the samel time secur`` 3 ing greater strength and durability than y any other form while the tension of thebelt on the pulleys` keeps `the twist in the belt 7o firm and taut. Y Rf y I do not claim rolling leather or other ma!` 1S terial into round beltin for machineryand cementing the `overlapping surfaces. Q y

I claimg The manufacture of round belting by pre;` .u paring the leather or other material `111 thegjf mode described and rolling and twisting the same in a spiral form` with` any required y number of conical` layersinthecylinder either with or without acylindrical space* the center of the belt and `cementing the 1 layers in the process" of manufacture subi stantially as described.

Witnesses: i `JOSEPH 'LPr "AN,

HENRY EARTE.

EUoLiD THAYEE.